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WO2014202460A1 - Lamp holder and manufacturing method thereof and illuminating device comprising the lamp holder - Google Patents

Lamp holder and manufacturing method thereof and illuminating device comprising the lamp holder Download PDF

Info

Publication number
WO2014202460A1
WO2014202460A1 PCT/EP2014/062247 EP2014062247W WO2014202460A1 WO 2014202460 A1 WO2014202460 A1 WO 2014202460A1 EP 2014062247 W EP2014062247 W EP 2014062247W WO 2014202460 A1 WO2014202460 A1 WO 2014202460A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
lamp holder
body part
assembling
assembling part
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2014/062247
Other languages
French (fr)
Inventor
Tingbiao LAN
Rencheng LI
Jing Lin
Qihui Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Osram GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osram GmbH filed Critical Osram GmbH
Priority to US14/898,753 priority Critical patent/US9863626B2/en
Priority to EP14730152.7A priority patent/EP3017246B1/en
Publication of WO2014202460A1 publication Critical patent/WO2014202460A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • F21V29/713—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements in direct thermal and mechanical contact of each other to form a single system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/237—Details of housings or cases, i.e. the parts between the light-generating element and the bases; Arrangement of components within housings or cases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/90—Methods of manufacture
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/01—Housings, e.g. material or assembling of housing parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/87—Organic material, e.g. filled polymer composites; Thermo-conductive additives or coatings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/85—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems characterised by the material
    • F21V29/89—Metals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a lamp holder and a method for manufacturing the lamp holder and an illuminating device comprising the lamp holder.
  • the injection molding is used more and more for manufacturing the lamp holder of the illuminating device.
  • the lamp holder not only can realize good heat exchange, but also can guarantee good insulation property of the illuminating device.
  • a hybrid illuminating device made from metal and plastic is usually used as the lamp holder of the illuminat- ing device.
  • Such lamp holder has a first housing of metal and a second housing of plastic wrapping the outside of the first housing.
  • heat inside the illuminating device can be highly effectively and quickly transferred to the second housing so as to achieve good heat dissipation effect.
  • the electrically insulating second housing wraps the outside of the first housing of metal, the first housing can be elec ⁇ trically insulating from the outside.
  • the first housing made from a metal material, for in ⁇ stance usually should be made integrally through a process similar to die casting; therefore, a high defective rate is always resulted from the manufacturing process. Moreover, due to requirements of the die casting process to the equipment and manufacturing time, etc., the manufacturing cost thereof also cannot be ignored.
  • one object of the present invention lies in providing a lamp holder of a lighting module.
  • Such lamp holder is easily manufactured and has a low cost, and therefore can reduce the defective rate resulted from the manufacturing process.
  • the lamp holder of a lighting module comprises a first housing and a second housing made from different materials, characterized in that the second housing comprises a body part and an assembling part in thermal contact with each other, wherein the second housing is embedded integrally in the first housing and in thermal contact with the first housing, and the assembling part and the body part are installed together.
  • the body part and the assembling part can be manufactured individually through various processes, respectively, moreover, by means of the thermal contact between the first housing and the second housing, the thermal conductivity of the lamp holder can be ensured to meet requirements in application circumstances. Therefore, various problems such as too high cost and high defective rate brought by, for instance, the die casting pro ⁇ cess in the conventional manufacturing process can be advan ⁇ tageously avoided.
  • the body part is made from a metal through a first process, and the assembling part is made from a metal through a second process.
  • the body part and the assembling part are made through different processes, appropriate processes can be chosen according to the specific structures of the two parts, thereby improving the yield in the manufacture.
  • the body part is configured as a metal stamping part, and the assembling part is configured as a metal extrusion part. To manufacture the assembling part through the extrusion process can apparently save the cost relative to the die casting pro- cess.
  • the body part and the assembling part are installed together in a manner of interference fit. Consequently, assembling of the second housing is realized without additional fastener or connector.
  • the body part and the assembling part are nested together. Stresses pressing each other are present between the body part and the assembling part nested therein. According to a preferred solution of the present invention, an outer circumferential wall of the assembling part is against an inner circumferential wall of the body part.
  • an end region of the body part facing to a light emergent side of the lighting module surrounds the assembling part.
  • the body part is configured as a cup, wherein the assembling part is embedded in an end region of the body part having a bigger cross section, and an end region of the body part having a smaller cross section is embedded in the first housing. That is to say, the major-diameter end of the body part is configured for fixed connection with the assembling part, and the remaining parts, especially the minor-diameter end, can be completely embedded in the first housing.
  • the body part and the assembling part are made from a rigid material. Therefore, interference fit between the body part and the assembling part can be ensured, moreover, the second housing formed thereby has a fixed profile.
  • the body part and the assembling part are made from aluminum.
  • Aluminum has the advantages of low density and good thermal conduct effect and therefore is fit for manufacturing the se ⁇ cond housing.
  • other suitable metal materials also can be taken into consideration for manufacturing, or different metal materials also can be taken into consideration for manufacturing separately, the body part and the assembling part.
  • the body part and the assembling part are installed together in a manner of thermal expansion and contraction.
  • the body part can be heated to slightly increase the major-diameter end thereof, thereby the assembling part can be successfully embedded therein, and then it is quickly cooled to ensure formation of interference fit between the body part and the assembling part.
  • the body part and the assembling part are installed to- gether in a manner of stamping.
  • the first housing is a cup, and an inner circumferential wall of the first housing defines an accommodation cavity for placing the lighting module.
  • the assembling part is configured as a ring part, wherein the inner circumferential wall of the assembling part can be con ⁇ figured for connection or contact with parts which need to be fixed in the lamp holder.
  • a stop portion for the assembling part is in an end region of the first housing facing to a light emergent side of the lighting module.
  • an anti-stripping structure is formed in an axial direction, preventing the second housing from escaping from the first housing.
  • the stop portion extends radially inwardly, and the assem ⁇ bling part is sandwiched axially between the stop portion and an end surface of an inner circumferential wall of the first housing .
  • At least one groove is formed on an inner wall of the assem ⁇ bling part.
  • the groove can be configured as accommodation groove for receiving fasteners such as screws or the like, as a result, the lamp holder, especially the assembling part, can be ensured to be in fixed connection with parts which need to be fixed in the lamp holder.
  • a plurality of grooves are formed on the inner wall of the as ⁇ sembling part, and the plurality of grooves are distributed uniformly in a circumferential direction. Therefore, it can be ensured that the lamp holder can be in uniform and circum- ferentially full fixed connection with parts which need to be fixed in the lamp holder.
  • the first housing is made from a plastic.
  • the first housing and the second housing are formed in one piece through an overmolding process.
  • the lamp holder is a heat sink.
  • the lamp holder can support, protect and radiate heat for the lighting module accommodated therein.
  • the present invention further relates to a method for manufacturing the above lamp holder, characterized by comprising steps of: a) providing the body part and the assembling part for form- ing the second housing; b) fixing together, by interference fit, the body part and the assembling part which are in thermal contact with each other so as to form the second housing; and c) moulding an insulating first housing on the second hous- ing, wherein the second housing is at least partly embedded in the first housing and is in thermal contact with the first housing so as to form the lamp holder.
  • the manufacturing cost of the second hous ⁇ ing, or the whole lamp holder can be reduced, and the yield in the manufacture of the lamp holder is improved.
  • the assembling part is made through an extrusion process, and the body part is made through a stamping pro ⁇ cess.
  • step b) the body part and the assembling part are nested together .
  • the first housing is made from a plastic, wherein an overmolding process is used to enable the first housing to wrap the second housing in one piece.
  • the present invention further relates to an illuminating device, comprising a lighting module, characterized by further comprising the above lamp holder.
  • Fig. 1 shows a 3D sectional view of a first embodiment of a lamp holder according to the present invention
  • Fig. 2 shows a 3D exploded view of a second housing of the lamp holder as shown in Fig. 1 ;
  • Fig. 3 shows a 3D view of the second housing as shown in Fig. 1 after assembling; and Fig. 4 shows a 3D exploded view of an illuminating device ac ⁇ cording to the present invention.
  • FIG. 1 shows a 3D sectional view of a first embodiment of a lamp holder according to the present invention.
  • a lamp holder 100 comprises a first housing 1 and a second housing 2, wherein the first housing 1 is an insulating housing made from a plastic, and the second housing 2 is a metal housing made from a metal. Therefore, the overmolding process can be preferably used to enable the first housing 1 to wrap and to be formed integrally with the second housing 2.
  • the lamp holder 100 can dissipate heat for a light ⁇ ing module installed therein, and therefore can be a heat sink.
  • the second housing 2 comprises a body part 21 and an assembling part 22 in thermal contact with each other, wherein the assembling part 22 and the body part 21 are installed together such that the second housing 2 can be integrally embedded in the first housing 1.
  • the thermal contact between the second housing 2 and the first housing 1 can be realized.
  • a stop portion 11 for the assembling part 22 In an end region of the first housing 1 facing to a light emergent side of the lighting module (not shown), i.e. in the upper part of the figure, there is a stop portion 11 for the assembling part 22.
  • the stop portion 11 extends radially inwardly start ⁇ ing from an inner wall of the first housing 1 so as to form a ring structure.
  • the assembling part 22 is sandwiched axially between the stop portion 11 and an end surface of an inner circumferential wall Al .
  • the lamp holder 100 is configured as a cup with a cross section which is circular.
  • the lamp holder is configured as a cup with a square cross section, or other rotationally symmetric cups.
  • the body part also can have a cylindrical profile.
  • Fig. 2 shows a 3D exploded view of the second housing of the lamp holder as shown in Fig. 1.
  • the body part 21 and the assembling part 22 which can be made from the same or different metals are manufactured through different processes.
  • a rigid material is par ⁇ ticularly chosen for manufacturing the body part 21 and the assembling part 22.
  • the body part 21 is configured as a cup-shaped metal stamping part
  • the assembling part 22 is configured as a metal extrusion part.
  • the body part 21 and the assembling part 22 are preferably made from aluminum.
  • the inner circumferential wall Al of the first housing 1 de ⁇ fines an accommodation cavity 10 for placing the lighting module 201.
  • the assembling part 22 is configured as a ring part.
  • three grooves 22.1 distributed uniformly in the circumferential di ⁇ rection are formed.
  • the grooves 22.1 can be configured as ac- commodation grooves for receiving fasteners such as screws or the like, as a result, the lamp holder 100, especially the assembling part 22, can be ensured to be in fixed connection with parts which need to be fixed in the lamp holder 100.
  • the number of the grooves can be two or more than three, and the grooves also can be configured as thread grooves or grooves of other types.
  • Fig. 3 shows a 3D view of the second housing 2 as shown in Fig. 1 after assembling.
  • the body part 21 and the assembling part 22 can be installed together merely in a manner of interference fit without addi ⁇ tional fastener.
  • the fixed connection manners such as soldering, bonding or bolted connection for integrating the body part 21 and the assembling part 22 can be omitted.
  • the body part 21 and the assembling part 22 can be installed together in a manner of heat expansion and cold contraction.
  • the body part 21 is cooled to contract radially inwardly. Consequently, an end region of the body part 21 facing to the light emergent side of the lighting module, i.e. the end re ⁇ gion of the body part 21 oriented upwardly, surrounds the as ⁇ sembling part 22, and meanwhile, an outer circumferential wall of the assembling part 22 is against the inner circum ⁇ ferential wall of the body part 21.
  • Other processes also can be taken into consideration to install the body part 21 and the assembling part 22 together, for example, it can be realized with the aid of stamping.
  • Fig. 4 shows a 3D exploded view of an illuminating device 200 according to the present invention.
  • the lighting module 201 which needs to be installed together with the lamp holder 100 is also shown, comprising a driver 201.1, a support 201.2, a light engine 201.3, a lens 201.4 and a lamp cover 201.5.
  • the above parts are installed in turn and inserted into the lamp holder 100 so as to form the complete illuminating device 200.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Manufacturing & Machinery (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The present invention relates to a lamp holder (100) of a lighting module, comprising a first housing (1) and a second housing (2) made from different materials, characterized in that the second housing (2) comprises a body part (21) and an assembling part (22) in thermal contact with each other, wherein the second housing (2) is embedded integrally in the first housing (1) and in thermal contact with the first housing (1), and the assembling part (22) and the body part (21) are installed together. In addition, the present invention further relates to a method for manufacturing the lamp holder and an illuminating device comprising the lamp holder.

Description

Description
Lamp Holder and Manufacturing Method thereof and Illuminating
Device Comprising the Lamp Holder
Technical Field
The present invention relates to a lamp holder and a method for manufacturing the lamp holder and an illuminating device comprising the lamp holder. Background Art
In the manufacturing process of modern electronic device, es¬ pecially LED illuminating device, the injection molding, especially the overmolding process, is used more and more for manufacturing the lamp holder of the illuminating device. By manufacturing through such processes, the lamp holder not only can realize good heat exchange, but also can guarantee good insulation property of the illuminating device. In the prior art, a hybrid illuminating device made from metal and plastic is usually used as the lamp holder of the illuminat- ing device. Such lamp holder has a first housing of metal and a second housing of plastic wrapping the outside of the first housing. Thus, with the aid of the thermal conduct property of metal, heat inside the illuminating device can be highly effectively and quickly transferred to the second housing so as to achieve good heat dissipation effect. Moreover, since the electrically insulating second housing wraps the outside of the first housing of metal, the first housing can be elec¬ trically insulating from the outside.
For this hybrid heat dissipation device configured as a lamp holder, the first housing made from a metal material, for in¬ stance, usually should be made integrally through a process similar to die casting; therefore, a high defective rate is always resulted from the manufacturing process. Moreover, due to requirements of the die casting process to the equipment and manufacturing time, etc., the manufacturing cost thereof also cannot be ignored. Summary of the Invention
Therefore, one object of the present invention lies in providing a lamp holder of a lighting module. Such lamp holder is easily manufactured and has a low cost, and therefore can reduce the defective rate resulted from the manufacturing process.
The lamp holder of a lighting module provided according to the present invention comprises a first housing and a second housing made from different materials, characterized in that the second housing comprises a body part and an assembling part in thermal contact with each other, wherein the second housing is embedded integrally in the first housing and in thermal contact with the first housing, and the assembling part and the body part are installed together. By designing the second housing in a two-part structure, the body part and the assembling part can be manufactured individually through various processes, respectively, moreover, by means of the thermal contact between the first housing and the second housing, the thermal conductivity of the lamp holder can be ensured to meet requirements in application circumstances. Therefore, various problems such as too high cost and high defective rate brought by, for instance, the die casting pro¬ cess in the conventional manufacturing process can be advan¬ tageously avoided.
According to a preferred solution of the present invention, the body part is made from a metal through a first process, and the assembling part is made from a metal through a second process. By manufacturing the body part and the assembling part through different processes, appropriate processes can be chosen according to the specific structures of the two parts, thereby improving the yield in the manufacture. According to a preferred solution of the present invention, the body part is configured as a metal stamping part, and the assembling part is configured as a metal extrusion part. To manufacture the assembling part through the extrusion process can apparently save the cost relative to the die casting pro- cess.
According to a preferred solution of the present invention, the body part and the assembling part are installed together in a manner of interference fit. Consequently, assembling of the second housing is realized without additional fastener or connector.
According to a preferred solution of the present invention, the body part and the assembling part are nested together. Stresses pressing each other are present between the body part and the assembling part nested therein. According to a preferred solution of the present invention, an outer circumferential wall of the assembling part is against an inner circumferential wall of the body part.
According to a preferred solution of the present invention, an end region of the body part facing to a light emergent side of the lighting module surrounds the assembling part.
According to a preferred solution of the present invention, the body part is configured as a cup, wherein the assembling part is embedded in an end region of the body part having a bigger cross section, and an end region of the body part having a smaller cross section is embedded in the first housing. That is to say, the major-diameter end of the body part is configured for fixed connection with the assembling part, and the remaining parts, especially the minor-diameter end, can be completely embedded in the first housing.
According to a preferred solution of the present invention, the body part and the assembling part are made from a rigid material. Therefore, interference fit between the body part and the assembling part can be ensured, moreover, the second housing formed thereby has a fixed profile.
According to a preferred solution of the present invention, the body part and the assembling part are made from aluminum. Aluminum has the advantages of low density and good thermal conduct effect and therefore is fit for manufacturing the se¬ cond housing. Of course, other suitable metal materials also can be taken into consideration for manufacturing, or different metal materials also can be taken into consideration for manufacturing separately, the body part and the assembling part.
According to a preferred solution of the present invention, the body part and the assembling part are installed together in a manner of thermal expansion and contraction. For instance, the body part can be heated to slightly increase the major-diameter end thereof, thereby the assembling part can be successfully embedded therein, and then it is quickly cooled to ensure formation of interference fit between the body part and the assembling part.
According to another preferred solution of the present inven- tion, the body part and the assembling part are installed to- gether in a manner of stamping.
According to a preferred solution of the present invention, the first housing is a cup, and an inner circumferential wall of the first housing defines an accommodation cavity for placing the lighting module.
According to a preferred solution of the present invention, the assembling part is configured as a ring part, wherein the inner circumferential wall of the assembling part can be con¬ figured for connection or contact with parts which need to be fixed in the lamp holder.
According to a preferred solution of the present invention, a stop portion for the assembling part is in an end region of the first housing facing to a light emergent side of the lighting module. Thereby, an anti-stripping structure is formed in an axial direction, preventing the second housing from escaping from the first housing.
According to a preferred solution of the present invention, the stop portion extends radially inwardly, and the assem¬ bling part is sandwiched axially between the stop portion and an end surface of an inner circumferential wall of the first housing .
According to a preferred solution of the present invention, at least one groove is formed on an inner wall of the assem¬ bling part. The groove can be configured as accommodation groove for receiving fasteners such as screws or the like, as a result, the lamp holder, especially the assembling part, can be ensured to be in fixed connection with parts which need to be fixed in the lamp holder. According to a preferred solution of the present invention, a plurality of grooves are formed on the inner wall of the as¬ sembling part, and the plurality of grooves are distributed uniformly in a circumferential direction. Therefore, it can be ensured that the lamp holder can be in uniform and circum- ferentially full fixed connection with parts which need to be fixed in the lamp holder.
According to a preferred solution of the present invention, the first housing is made from a plastic. Advantageously, the first housing and the second housing are formed in one piece through an overmolding process.
According to a preferred solution of the present invention, the lamp holder is a heat sink. The lamp holder can support, protect and radiate heat for the lighting module accommodated therein.
In addition, the present invention further relates to a method for manufacturing the above lamp holder, characterized by comprising steps of: a) providing the body part and the assembling part for form- ing the second housing; b) fixing together, by interference fit, the body part and the assembling part which are in thermal contact with each other so as to form the second housing; and c) moulding an insulating first housing on the second hous- ing, wherein the second housing is at least partly embedded in the first housing and is in thermal contact with the first housing so as to form the lamp holder. By manufacturing in two parts the second housing in this hybrid lamp holder, the manufacturing cost of the second hous¬ ing, or the whole lamp holder, can be reduced, and the yield in the manufacture of the lamp holder is improved. According to a preferred solution of the present invention, in step a) the assembling part is made through an extrusion process, and the body part is made through a stamping pro¬ cess.
According to a preferred solution of the present invention, in step b) the body part and the assembling part are nested together .
According to a preferred solution of the present invention, in step c) the first housing is made from a plastic, wherein an overmolding process is used to enable the first housing to wrap the second housing in one piece.
The present invention further relates to an illuminating device, comprising a lighting module, characterized by further comprising the above lamp holder.
It shall be understood that both the above general descrip- tion and the following detailed description are for illustra¬ tive and explanative purposes in order to provide further de¬ scription of the claimed present invention.
Brief Description of the Drawings
The accompanying drawings constitute a part of the present Description and are used to provide further understanding of the present invention. Such accompanying drawings illustrate the embodiments of the present invention and are used to de¬ scribe the principles of the present invention together with the Description. In the accompanying drawings the same compo¬ nents are represented by the same reference numbers. As shown in the drawings :
Fig. 1 shows a 3D sectional view of a first embodiment of a lamp holder according to the present invention;
Fig. 2 shows a 3D exploded view of a second housing of the lamp holder as shown in Fig. 1 ;
Fig. 3 shows a 3D view of the second housing as shown in Fig. 1 after assembling; and Fig. 4 shows a 3D exploded view of an illuminating device ac¬ cording to the present invention.
Detailed Description of the Embodiments
In the following detailed description, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration specific embodiments in which the invention may be practiced. In this regard, di¬ rectional terminology, such as "top", "bottom", "inner", "outer", is used in reference to the orientation of the fig¬ ures being described. Because components of embodiments of the present invention can be positioned in a number of dif¬ ferent orientations, the directional terminology is used for purposes of illustration and is in no way limiting. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. The following de¬ tailed description, therefore, is not to be taken in a limit¬ ing sense, and the scope of the present invention is defined by the appended claims. It is to be understood that the features of the various exem¬ plary embodiments described herein may be combined with each other, unless specifically noted otherwise.
Fig. 1 shows a 3D sectional view of a first embodiment of a lamp holder according to the present invention. A lamp holder 100 comprises a first housing 1 and a second housing 2, wherein the first housing 1 is an insulating housing made from a plastic, and the second housing 2 is a metal housing made from a metal. Therefore, the overmolding process can be preferably used to enable the first housing 1 to wrap and to be formed integrally with the second housing 2. In cases where the first housing 1 is made from a thermal conductive plastic, the lamp holder 100 can dissipate heat for a light¬ ing module installed therein, and therefore can be a heat sink.
According to the present invention, the second housing 2 comprises a body part 21 and an assembling part 22 in thermal contact with each other, wherein the assembling part 22 and the body part 21 are installed together such that the second housing 2 can be integrally embedded in the first housing 1. In this situation, the thermal contact between the second housing 2 and the first housing 1 can be realized. In an end region of the first housing 1 facing to a light emergent side of the lighting module (not shown), i.e. in the upper part of the figure, there is a stop portion 11 for the assembling part 22. The stop portion 11 extends radially inwardly start¬ ing from an inner wall of the first housing 1 so as to form a ring structure. The assembling part 22 is sandwiched axially between the stop portion 11 and an end surface of an inner circumferential wall Al . Thus, it can be ensured that the as¬ sembling part 22 is located in a fixed position in the first housing 1 so as to prevent the second housing 2, when influ- enced by an external force, from stripping from the first housing 1.
In the present embodiment, the lamp holder 100 is configured as a cup with a cross section which is circular. However, it also can be taken into consideration that in a second embodi¬ ment not shown, the lamp holder is configured as a cup with a square cross section, or other rotationally symmetric cups. Besides, in a third embodiment not shown, the body part also can have a cylindrical profile. Fig. 2 shows a 3D exploded view of the second housing of the lamp holder as shown in Fig. 1. The body part 21 and the assembling part 22 which can be made from the same or different metals are manufactured through different processes. In order to ensure that the body part 21 and the assembling part 2 can be stably assembled as en entirety, a rigid material is par¬ ticularly chosen for manufacturing the body part 21 and the assembling part 22. In the present embodiment, the body part 21 is configured as a cup-shaped metal stamping part, and the assembling part 22 is configured as a metal extrusion part. In order to ensure good heat dissipation effect and small dead weight of the lamp holder 100, the body part 21 and the assembling part 22 are preferably made from aluminum.
The inner circumferential wall Al of the first housing 1 de¬ fines an accommodation cavity 10 for placing the lighting module 201. Corresponding to the section of the accommodation cavity 10, the assembling part 22 is configured as a ring part. On an inner wall of the assembling part 22, three grooves 22.1 distributed uniformly in the circumferential di¬ rection are formed. The grooves 22.1 can be configured as ac- commodation grooves for receiving fasteners such as screws or the like, as a result, the lamp holder 100, especially the assembling part 22, can be ensured to be in fixed connection with parts which need to be fixed in the lamp holder 100.
In another embodiment not shown, the number of the grooves can be two or more than three, and the grooves also can be configured as thread grooves or grooves of other types.
Fig. 3 shows a 3D view of the second housing 2 as shown in Fig. 1 after assembling. In order to decrease the number of parts of the lamp holder and reduce the manufacturing cost, the body part 21 and the assembling part 22 can be installed together merely in a manner of interference fit without addi¬ tional fastener. Thus, the fixed connection manners such as soldering, bonding or bolted connection for integrating the body part 21 and the assembling part 22 can be omitted.
For instance, the body part 21 and the assembling part 22 can be installed together in a manner of heat expansion and cold contraction. After the assembling part 22 is put into a major-diameter end of the body part 21 which expands with heat, the body part 21 is cooled to contract radially inwardly. Consequently, an end region of the body part 21 facing to the light emergent side of the lighting module, i.e. the end re¬ gion of the body part 21 oriented upwardly, surrounds the as¬ sembling part 22, and meanwhile, an outer circumferential wall of the assembling part 22 is against the inner circum¬ ferential wall of the body part 21. Other processes also can be taken into consideration to install the body part 21 and the assembling part 22 together, for example, it can be realized with the aid of stamping.
Fig. 4 shows a 3D exploded view of an illuminating device 200 according to the present invention. Apart from the lamp hold- er 100 already shown in Fig. 1, the lighting module 201 which needs to be installed together with the lamp holder 100 is also shown, comprising a driver 201.1, a support 201.2, a light engine 201.3, a lens 201.4 and a lamp cover 201.5. The above parts are installed in turn and inserted into the lamp holder 100 so as to form the complete illuminating device 200.
The above is merely preferred embodiments of the present in¬ vention but not to limit the present invention. For the per- son skilled in the art, the present invention may have vari¬ ous alterations and changes. Any alterations, equivalent sub¬ stitutions, improvements, within the spirit and principle of the present invention, should be covered in the protection scope of the present invention.
, ^
List of reference signs
1 first housing
11 stop portion
2 second housing
21 body part
22 assembling part
22.1 groove
10 accommodation cavity
100 lamp holder
200 illuminating device
201 lighting module
201.1 driver
201.2 support
201.3 light engine
201.4 lens
201.5 lamp cover
Al inner circumferential wall of the first housing

Claims

Patent claims
1. A lamp holder (100) of a lighting module (201), compris¬ ing a first housing (1) and a second housing (2) made from different materials, characterized in that the se¬ cond housing (2) comprises a body part (21) and an as¬ sembling part (22) in thermal contact with each other, wherein the second housing (2) is embedded integrally in the first housing (1) and in thermal contact with the first housing (1), and the assembling part (22) and the body part (21) are installed together.
2. The lamp holder (100) according to Claim 1, characterized in that the body part (21) is made from a metal through a first process, and the assembling part (22) is made from a metal through a second process.
3. The lamp holder (100) according to Claim 1, characterized in that the body part (21) is configured as a metal stamping part, and the assembling part (22) is configured as a metal extrusion part.
4. The lamp holder (100) according to Claim 2, characterized in that the body part (21) and the assembling part (22) are installed together in a manner of interference fit.
5. The lamp holder (100) according to any one of Claims 1- 4, characterized in that the body part (21) and the as¬ sembling part (22) are nested together.
6. The lamp holder (100) according to Claim 5, characterized in that an outer circumferential wall of the assem¬ bling part (22) is against an inner circumferential wall of the body part (21)
7. The lamp holder (100) according to Claim 5, characterized in that an end region of the body part (21) facing to a light emergent side of the lighting module (201) surrounds the assembling part (22) .
8. The lamp holder (100) according to Claim 5, characterized in that the body part (21) is configured as a cup, wherein the assembling part (22) is embedded in an end region of the body part (21) having a bigger cross sec¬ tion, and an end region of the body part (21) having a smaller cross section is embedded in the first housing (1) .
9. The lamp holder (100) according to any one of Claims 1- 4, characterized in that the body part (21) and the as¬ sembling part (22) are made from a rigid material.
10. The lamp holder (100) according to Claim 9, characterized in that the body part (21) and the assembling part (22) are made from aluminum.
11. The lamp holder (100) according to any one of Claims 1- 4, characterized in that the body part (21) and the as¬ sembling part (22) are installed together in a manner of thermal expansion and contraction.
12. The lamp holder (100) according to any one of Claims 1- 4, characterized in that the body part (21) and the as¬ sembling part (22) are installed together in a manner of stamping .
13. The lamp holder (100) according to any one of Claims 1- 4, characterized in that the first housing (1) is a cup, and an inner circumferential wall (Al) of the first housing (1) defines an accommodation cavity (10) for placing the lighting module (201) .
14. The lamp holder (100) according to any one of Claims 1- 4, characterized in that the assembling part (22) is configured as a ring part.
15. The lamp holder (100) according to Claim 14, characterized in that a stop portion (11) for the assembling part (22) is provided in an end region of the first housing (1) facing to a light emergent side of the lighting mod¬ ule (201) .
16. The lamp holder (100) according to Claim 15, characterized in that the stop portion (11) extends radially in¬ wardly, and the assembling part (22) is sandwiched axi- ally between the stop portion (11) and an end surface of an inner circumferential wall (Al) of the first housing (1) .
17. The lamp holder (100) according to any one of Claims 1- 4, characterized in that at least one groove (22.1) is formed on an inner wall of the assembling part (22) .
18. The lamp holder (100) according to Claim 17, characterized in that a plurality of grooves (22.1) are formed on the inner wall of the assembling part (22), and the plu¬ rality of grooves (22.1) are uniformly distributed in a circumferential direction.
19. The lamp holder (100) according to any one of Claims 1- 4, characterized in that the first housing (1) is made from a plastic.
20. The lamp holder (100) according to Claim 19, characterized in that the first housing (1) and the second hous¬ ing (2) are formed in one piece through an overmolding process .
21. The lamp holder (100) according to any one of Claims 1- 4, characterized in that the lamp holder (100) is a heat sink .
22. A method for manufacturing the lamp holder (100) for lighting module (201) according to any one of Claims 1- 21, characterized by comprising steps of: a) providing a body part (21) and an assembling part (22) for forming a second housing (2); b) fixing together, by interference fit, the body part (21) and the assembling part (22) which are in thermal contact with each other so as to form the second housing (2 ) ; and c) moulding an insulating first housing (1) on the second housing (2), wherein the second housing (2) is at least partly embedded in the first housing (1) and is in thermal contact with the first housing (1) so as to form the lamp holder (100) .
23. The method according to Claim 22, characterized in that in step a) the assembling part (22) is made through an extrusion process, and the body part (21) is made through a stamping process.
24. The method according to Claim 22, characterized in that in step b) the body part (21) and the assembling part (22) are nested together.
25. The method according to Claim 22, characterized in that in step c) the first housing (1) is made from a plastic, wherein an overmolding process is used to enable the first housing (1) to wrap the second housing (2) in one piece .
26. An illuminating device (200), comprising a lighting module (201), characterized by further comprising the lamp holder (100) according to any one of Claims 1-21.
PCT/EP2014/062247 2013-06-19 2014-06-12 Lamp holder and manufacturing method thereof and illuminating device comprising the lamp holder Ceased WO2014202460A1 (en)

Priority Applications (2)

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Applications Claiming Priority (2)

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CN201310244192.6A CN104235748B (en) 2013-06-19 2013-06-19 Lamp housing and its manufacturing method and lighting device including the lamp housing

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CN104235748A (en) 2014-12-24
US9863626B2 (en) 2018-01-09
US20160138793A1 (en) 2016-05-19
CN104235748B (en) 2018-08-31
EP3017246A1 (en) 2016-05-11
EP3017246B1 (en) 2017-10-18

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